Later archive addition

Exploiting ASP.NET TemplateParser — Part I

Markus Wulftange · Code White

The ASP.NET Web Forms TemplateParser, fed attacker-controlled markup through ParseControl, instantiates arbitrary types with a public parameterless constructor and drives arbitrary property setters along property paths, before any compilation. Sitecore exposed ParseControl over an AJAX handler, so AssemblyInstaller gave remote code execution and RemotingService leaked connection strings.

Record

Researcher

Markus Wulftange

Published by

Code White

In the archive

• Added to the 2023 archive after the original list was published

Related sources

• Part II: SharePoint (CVE-2023-33160)
• Foundational SharePoint research
• Foundational Template Security paper

Tags

• aspnet
• dotnet
• gadget-chain
• rce
• ssti
• deserialization
• info-leak
• cve
• owasp-a03-2021
• owasp-a08-2021

This page is the archive's own catalogue record. The research is the work of Markus Wulftange, first published at the original source. Preserved copies are kept so the citation survives its host.